That depends on the mass of the proto-star.
No, a protostar is basically the BEGINNING of a star's life cycle.
It must collect enough mass in order for gravity to be able to turn it into a sphere.
A star is called a protostar before it begins nuclear fusion in its core and officially becomes a star. During this stage, a protostar is formed from a collapsing cloud of gas and dust, as gravity pulls material together and heats up the core.
A protostar will live as long as 100,000 years. After material stops falling on the protostar it will enter then T Tauri star phase.
The basic idea is that the protostar contracts, under the influence of gravity, until it gets dense and hot enough to undergo nuclear fusion. You can find more details at the Wikipedia article "Protostar".
A protostar is more like a stage previous to a star - before it ignites.
No, a protostar is basically the BEGINNING of a star's life cycle.
Protostar
A baby star is a newborn star. It is called "protostar."
A star that is forming is called a protostar.
The term is "protostar", not "prostar". Yes. A protostar is an early stage of a star.
A high mass protostar will eventually evolve into a massive star like a red supergiant, followed by a supernova explosion. After the supernova event, the remnants may form a neutron star or a black hole.
protostar
Yes
No one. It comes from the Greek - proto - meaning first. So first star - a protostar.
It must collect enough mass in order for gravity to be able to turn it into a sphere.
trapping of thermal energy inside the protostar